Insights into the Adsorption, Alloy Formation, and Poisoning Effects of Hg on Monometallic and Bimetallic Adsorbents.

The removal of elemental mercury (Hg) from coal-derived syngas at high temperatures is desired to improve the thermal efficiency of the coal-to-chemical processes. First-principles density functional theory (DFT) calculations for Hg adsorption are performed using different exchange correlation functionals (PBE, optPBE-vdW, and optB88-vdW). Gibbs free energy (Δ) calculations are further performed to evaluate the feasibility of Hg adsorption on various exposed planes of metal nanoparticles and to obtain bimetallic compositions for Hg removal at various temperatures.

The Operating Cycle of NO Adsorption and Desorption in Pd-Chabazite for Passive NO Adsorbers.

Pd-doped chabazite (Pd/CHA) offers unique opportunities to adsorb and desorb NO in the target temperature range for application as a passive NO adsorber (PNA). The ability of Pd/CHA to trap NO emissions at low temperatures (<200 °C) is facilitated by the binding of NO species at various Pd sites available in the CHA framework. Density functional theory (DFT) simulations are performed to understand Pd speciation in CHA and the interaction of NO with Pd/CHA to explain the mechanisms of NO adsorption, oxidation, and desorption processes.

Selective separation of beta-lactoglobulin from sweet whey using CGAs generated from the cationic surfactant CTAB.

The selective separation of whey proteins was studied using colloidal gas aphrons generated from the cationic surfactant cetyl trimethyl ammonium bromide (CTAB). From the titration curves obtained by zeta potential measurements of individual whey proteins, it was expected to selectively adsorb the major whey proteins, i.e.